The Small Deep Space Transponder is a transponder designed by JPL specifically for deep space probes.[1] It unifies a number of communication functions -
receiver, command detector, telemetry modulator, exciters, beacon tone generator, and control functions - into one 3-kg package. The SDST is designed to handle X band uplink and both X band and Ka band downlink. JPL estimates that performing the same functions with separate units (as was done previously) requires over twice the mass and 4 or 5 individual subassemblies.[2]
^Zingales, Sam. "Small Deep-Space Transponder Development". Archived from the original on 2013-02-20.
^"Small Deep Space Transponder". New Millennium Program, NASA JPL. Archived from the original on 2004-10-23.
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